Configuring Summer Time (Daylight Saving Time) - Cisco Catalyst 4500 Series Configuration Manual

Chapter 4 Administering the Switch

Configuring Summer Time (Daylight Saving Time)

To configure summer time (daylight saving time) in areas where it starts and ends on a particular day of
the week each year, perform this task:
Command
Step 1
configure terminal
Step 2
clock summer-time zone recurring
[
week day month hh:mm week day
[
month hh:mm offset
Step 3
end
Step 4
show running-config
Step 5
copy running-config startup-config
The first part of the clock summer-time global configuration command specifies when summer time
begins, and the second part specifies when it ends. All times are relative to the local time zone. The start
time is relative to standard time. The end time is relative to summer time. If the starting month is after
the ending month, the system assumes that you are in the southern hemisphere.
This example shows how to specify that summer time starts on the first Sunday in April at 02:00 and
ends on the last Sunday in October at 02:00:
Switch# configure terminal
Switch(config)# clock summer-time PDT recurring 1 Sunday April 2:00 last Sunday October
2:00
Switch(config)# end
Switch#
OL-25340-01
Purpose
Enters global configuration mode.
Configures summer time to start and end on the specified days every year.
Summer time is disabled by default. If you specify clock summer-time
]]
zone recurring without parameters, the summer time rules default to the
United States rules.
For zone, specify the name of the time zone (for example, PDT) to be
•
displayed when summer time is in effect.
• (Optional) For week, specify the week of the month (1 to 5 or last).
(Optional) For day, specify the day of the week (Sunday, Monday...).
•
(Optional) For month, specify the month (January, February...).
•
(Optional) For hh:mm, specify the time (24-hour format) in hours and
•
minutes.
(Optional) For offset, specify the number of minutes to add during
•
summer time. The default is 60.
Returns to privileged EXEC mode.
Verifies your entries.
(Optional) Saves your entries in the configuration file.
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
Managing the System Time and Date
4-13